If you see someone playing UFC 4 on a computer, they are using one of these workarounds rather than an official PC copy:
If you want to support the PC cause, do not buy fake UFC 4 keys. Instead: Ufc 4 Activation Key Pc
Since the game isn't on PC, here is a short story about the "legendary" search for a key that doesn't exist: The Phantom Key If you see someone playing UFC 4 on